Elastic surgical bandage

ABSTRACT

Elastic surgical bandage consisting of chain stitches each formed of nonelastic yarn running reciprocatively across adjoining loops in the chain stitches or across the loops of more than one wale ahead, and polyurethane yarn knitted along the wale, through a portion or all parts of the successive loops in the chain stitch.

I United States Patent [111 3,570,482

[72] Inventors Shigen Emoto; 56 References Cited Hiroshn Yamamoto,Shizuoka-ken, Japan UNITED STATES PATENTS [21] Appl. No. 782,030

Dec. 9 I Wagler Patented Mar. GI'OSS et al. 3,339,549 9/1967 Morse66/192 [73] Assignee Flljlbmkl Kabushtkl Kalsha Tokyo-to, Japan3,461,695 8/1969 Knohl 66/202 Primary Examiner-Adele M. EagerAttorney-Whittemore, Hulbert & Belknap [54] ELASTIC SURGICAL BANDAGE 10Claims, 3 Drawing Figs. [52] 11.8. C1 128/156, B TRACT: Elastic surgicalbandage consisting of chain 66/193 stitches each formed of nonelasticyarn running reciprocative- [51] Int.Cl A6lf15/00 ly across adjoiningloops in the chain stitches or across the [50] Field ofSearch 128/155, lp of r n o Wale ahead, n p ly re hane yam 156, 157, 159, 171, 290;66/193, 192, 195, 202; knitted along the wale, through a portion or allparts of the, 87/2 successive loops in the chain stitch.

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Patented Mrch16, 1971 3,570,482

INVENTORS Shigeru Emoto Hiro 2 2 2 2 shi Yamamoto F'G. 2 BY 90% 45194ATTORNEY BACKGROUND OF THE INVENTION It is very important that thesurgical bandage should have a proper elasticity, in order to fit on anaffected part, to protect the diseased part and to prevent the bandagefrom loosening or slipping. In order to overcome such defects, it hasbeen proposed to replace a part or all of warp yarns which compose asurgical bandage cloth with elastic yarns such as rubber yarn, speciallymodified yarns, etc. However, it was impossible to provide satisfactorysurgical bandage. If one desires an increase in theair permeability ofthe bandage the density of warp and weft yarn in the fabric should bemade rough or the yarn should be made fine, which eventually causes slipbetween warp and weft yarn and also generates strain of the texture inthe weave. The present invention provides a surgical bandage by whichall of the above mentioned problems have been overcome.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 shows an enlarged texture of oneembodiment of the surgical bandage of this invention.

FIG. 2 shows an enlarged texture of another embodiment of the invention.

FIG. 3 shows an enlarged texture of the surgical b'andage of thisinvention which is divided into warp direction.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A surgical bandage in preferredembodiment as shown in FIG. 1 consists of weft yarn 5 formed ofnonelastic yarn and running reciprocatively across loops 3, 4 of thechain stitches 2 adjoining one another and each formed of nonelasticyarnl, such as cotton, rayon, polynosic, etc. and polyurethane elasticyarn 6 knitted along the wale, through successive loops 3, 4 in all orsome parts of the chain stitch 2.

Another preferred embodiment of the surgical bandage shown in FIG. 2consists of weft yarn made of nonelastic yarn running reciprocativelyacross the loops in the chain stitch located more than one wale apart.Adjoining chain stitches are tied by weft yarn 5, so that when the weftyarn is pulled out, the knitted cloth is divided lengthwise. This meansthat it is possible to divide or split the knitted cloth lengthwise atany desired width, and the selvages of the divided bandage itself form aperfect surgical bandage, neither forming raised naps nor causing thefalling out of warps as is often encountered in the usual woven bandage.

As is obvious from the above explanation, the surgical bandage of thisinvention organizes so-called inlaid net. Accordingly, it hassuperior'air permeability and resistance to slip between warp and weftyarns and thereby keeps the weft yarns within the warp surgical bandagewithout accompanying strain upon wearing. The greater the number ofwales over which the weft yarns cross is the thicker the cloth which isobtained.

The polyurethane elastic yarn may be used either as uncovered yarn or ascovered yarn being entwined with other yarn, i.e., in the form ofso-called core yarn. These elastic yarns are knitted while underconstant tension. After knitting, they shrink in proportion to theelasticity, and on wearing, the bandage shows adequate extensibility.Because the elasticity is little affected by the covering yarn or fiber,a soft elastic force can be exerted to the surgical bandage. Since thesurgical bandage cloth of this invention has hooked weft yarns runningacross the loops of chain stitch adjoined one another, the weft yarnsare kept more firmly by the chain stitch than those of or dinary plainweave bandage cloth. Slip between warp and weft yarns never takes placeeven when the density of warp and weft yarn is roughened. Roughening canbe accomplished without causing strain in the texture. The warp yarnforms the chain stitch and the weft yarn runs-through its loops, so thatit is possible to obtain rough density, bandages by simply reduc ingnumber of the stitches per unit length. Accordingly the density of weftyarn can be roughened freely while maintainin the len thwise elasticityat a hi h level.

IG. 3 s ows a state where in a nitted cloth is divided into two parts,i.e., right and left sides, by pulling out the weft yarns. The weftyarns can be easily pulled out by simply cutting anywhere with scissors.On knitting this bandage cloth only a given part of the weft yarns'maybe formed with watersoluble yarn and after dissolving the soluble yarnby hot water treatment, it is possible to efficiently conduct theknitting process using the full width of a knitting machine and toeasily determine the desired width of the product.

We claim:

I. A fabric for surgical bandage or the like comprising a plurality ofchains of chain stitches extending in the direction of warp and formedof nonelastic yarn, nonelastic weft yarn members running reciprocativelyacross and through adjacent loops in adjacent chains for at least aportion of the length of the chains at least some of which weft yarnmembers are water soluble whereby on dissolution or cutting of a weftyarn member and withdrawal thereof the fabric is divided in thedirection of the warp.

2. Structure as set forth in claim 1 and further including additionalweft yarn members running reciprocatively across and through adjacentloops in a chain of chain stitches for at least a portion of the lengthof the chain which additional weft yarn members are elastic.

3. Structure as set forth in claim 1 wherein the nonelastic weft yarnmembers extend across and through chains of chain stitches separated byat least one intermediate chain of chain stitches.

4. Structure as set forth in claim 2 wherein the nonelastic weft yarnmembers extend across and through chains of chain stitches separated byat least one intermediate chain of chain stitches.

5. Structure as set forth in claim'l wherein at least some of thenonelastic weft yarn members are one of, cotton yarn, rayon yarn andpolynosic fiber yarn.

6. Structure as set forth in claim 2 wherein at least some of thenonelastic weft yarn members are one of cotton yarn,

loops in adjacent chains for at least a portion of the length of thechains and additional weft yarn members running reciprocatively acrossand through adjacent loops in a chain of chain stitches for at least aportion of the length of the chain which additional weft yarn membersare elastic whereby stretching of the fabric in the warp direction ispermitted and on removal of a nonelastic weft yarn member the fabric issplit in the direction of the warp.

9. Structure as set forth in claim 8, wherein at least some of thenonelastic weft yarn members are one of cotton yarn, rayon yarn andpolynosic fiber yarn.

10. Structure as set forth in claim 8, wherein at least some of theelastic weft yarn members are one of covered yarn, core yarn, or bareyarn.

1. A fabric for surgical bandage or the like comprising a plurality ofchains of chain stitches extending in the direction of warp and formedof nonelastic yarn, nonelastic weft yarn members running reciprocativelyacross and through adjacent loops in adjacent chains for at least aportion of the length of the chains at least some of which weft yarnmembers are water soluble whereby on dissolution or cutting of a weftyarn member and withdrawal thereof the fabric is divided in thedirection of the warp.
 2. Structure as set forth in claim 1 and furtherincluding additional weft yarn members running reciprocatively acrossand through adjacent loops in a chain of chain stitches for at least aportion of the length of the chain which additional weft yarn membersare elastic.
 3. Structure as set forth in claim 1 wherein the nonelasticweft yarn members extend across and through chains of chain stitchesseparated by at least one intermediate chain of chain stitches. 4.Structure as set forth in claim 2 wherein the nonelastic weft yarnmembers extend across and through chains of chain stitches separated byat least one intermediate chain of chain stitches.
 5. Structure as setforth in claim 1 wherein at least some of the nonelastic weft yarnmembers are one of, cotton yarn, rayon yarn and polynosic fiber yarn. 6.Structure as set forth in claim 2 wherein at least some of thenonelastic weft yarn members are one of cotton yarn, rayon yarn andpolynosic fiber yarn.
 7. Structure as set forth in claim 2 wherein atleast some of the elastic weft yarn members are one of covered yarn,core yarn, or bare yarn.
 8. A fabric for surgical bandage or the likecomprising a plurality of chains of chain stitches extending in thedirection of warp and formed of nonelastic yarn, nonelastic weft yarnmembers running reciprocatively across and through adjacent loops inadjacent chains for at least a portion of the length of the chains andadditional weft yarn members running reciprocatively across and throughadjacent loops in a chain of chain stitches for at least a portion ofthe length of the chain which additional weft yarn members are elasticwhereby stretching of the fabric in the warp direction is permitted andon removal of a nonelastic weft yarn member the fabric is split in thedirection of the warp.
 9. Structure as set forth in claim 8, wherein atleast some of the nonelastic weft yarn members are one of cotton yarn,rayon yarn and polynosic fiber yarn.
 10. Structure as set forth in claim8, wherein at least some of the elastic weft yarn membErs are one ofcovered yarn, core yarn, or bare yarn.